Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 6411

GRB 070517: Swift detection of a burst
2007-05-17T11:40:57Z (17 years ago)
Scott Barthelmy at NASA/GSFC <>
S. D. Vergani (DIAS-DCU), S. D. Barthelmy (GSFC),
A. P. Beardmore (U Leicester), D. N. Burrows (PSU),
S. Campana (INAF-OAB), M. M. Chester (PSU),
G. Cusumano (INAF-IASFPA), P. A. Evans (U Leicester),
N. Gehrels (NASA/GSFC), J. A. Kennea (PSU), H. A. Krimm (GSFC/USRA),
W. B. Landsman (NASA/GSFC), V. Mangano (INAF-IASFPA),
A. Moretti (INAF-OAB), P. T. O'Brien (U Leicester),
J. P. Osborne (U Leicester), K. L. Page (U Leicester),
D. M. Palmer (LANL), P. Romano (Univ. Bicocca & INAF-OAB),
G. Sato (GSFC/ISAS), B. Sbarufatti (INAF-IASFPA),
M. Stamatikos (NASA/ORAU), R. L. C. Starling (U Leicester),
G. Tagliaferri (INAF-OAB), E. Troja (INAF-IASFPA) and
H. Ziaeepour (UCL-MSSL) report on behalf of the Swift Team:

At 11:20:58 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070517 (trigger=279494).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 277.579, -62.333 which is 
   RA(J2000)  =  18h 30m 19s
   Dec(J2000) = -62d 19' 56"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve shows two peaks
with a duration of about 10 sec.  The peak count rate
was ~1000 counts/sec (15-350 keV), at ~1 sec after the trigger. 

The XRT began taking data at 11:22:43 UT, 105 seconds after the BAT
trigger. The XRT on-board centroid algorithm did not find a source in
the image, but analysis of down-linked data yields a position:  
  RA(J2000) = 18h 30m 29.4s   
  Dec(J2000) = -62d 17' 50.8" 
with an uncertainty of 5.2 arcsec (radius, 90% containment). 
This position is  2.4 arcmin from the BAT position. 

The UVOT is unable to observe the field of GRB070517 due to the
presence of a 4th magnitude star 8 arcmin from the burst's location. 
The Galactic reddening in the direction of the burst is E(B-V) =
Looking for U.S. government information and services? Visit